Atsg Transmission 4f27e Dl Technical Service

INTRODUCTION

FORD 4F27E

FordMotorCompanyinajointventurewithMazdainJapanhavedevelopedanewdesigntransaxledesigned specifically for use in the Ford Focus, with the designation 4F27E, and Mazda designation is FN4A-EL. The new4F27EtransaxleisproducedbyFordMotorCompanyinSterlingHeights,Michigan.

Thisisafourspeed,FrontWheelDrive,withfullyelectroniccontrolsfortheupshiftsanddownshifts,with4th gear being overdrive. The individual gear ratios are achieved through two planetary gear sets connected one behindtheother. Thecomponentsoftheplanetarygearsetsaredrivenorlockedbymeansoffourmultipleplate clutches, one brake band and a one-way roller clutch. To minimize fuel consumption, the torque converter clutchisappliedbythePCMin3rdand4thgears,dependingonthrottlepositionandvehiclespeed. Thisunitis designedtouseMercon®Vautomatictransmissionfluid.

Themanualselectorlevergivesthedriverachoiceof"P","R","N","D","2","1",andallrangesareexplained in detail in this manual. It is also possible to operate an O/D cancel switch, located on the selector lever, to preventthetransaxlefromshiftinginto4thgearortoshiftdownto3rdgear.

We wish to thank Ford Motor Company for the information and illustrations that have made this booklet possible.

NopartofanyATSGpublicationmaybereproduced,storedinanyretrievalsystemortransmittedinanyformor by any means, including but not limited to electronic, mechanical, photocopying, recording or otherwise, without written permission of Automatic Transmission Service Group. This includes all text illustrations, tablesandcharts.

The information and part numbers contained in this booklet have been carefully compiled from industry sources known for their reliability, but ATSG does not guarantee its accuracy.

Copyright © ATSG 2004

DALE ENGLAND FIELD SERVICE CONSULTANT

WAYNE COLONNA TECHNICALSUPERVISOR

PETER LUBAN TECHNICALCONSULTANT

ROLAND ALVAREZ TECHNICALCONSULTANT

ED KRUSE TECHNICALCONSULTANT

MIKE SOUZA TECHNICALCONSULTANT GERALD CAMPBELL TECHNICALCONSULTANT

GENERAL DESCRIPTION

This is a four speed, Front Wheel Drive, with fully electronic controls for the upshifts and downshifts, with 4th gear being overdrive. The individual gear ratios are achieved through two planetary gear sets connected one behind the other. The components of the planetary gear sets are driven or locked by means of four multiple plate clutches, one brake band and a one-way roller clutch, and are illustrated in Figure 3, along with the component application chart for each gear. To minimize fuel consumption, the torque converter clutch is applied by the PCM in 3rd and 4th gears, depending on throttle position and vehicle speed. This unit is designed to use Mercon® V automatictransmissionfluid.

The manual selector lever, shown in Figure 2, gives thedriverachoiceof"P","R","N","D","2","1",and all ranges are explained in detail below. It is also possible to operate an O/D cancel switch, located on the selector lever, to prevent the transaxle from shiftinginto4thgearortoshiftdownto3rdgear.

Special Note: This transaxle currently shows two different axle ratios and Page 9 also shows how to identify which ratio belongs in the vehicle that you may have. Surely you must know by now that the PCM will recogonize almost instantly if you install the wrong axle ratio.

The 4F27E transaxle is equipped with six different solenoids to shift the transaxle through the various gears and to control line pressure. Shift Solenoids "A" and "B" are On-Off solenoids and control shift valves in the valve body. Shift Solenoids "C", "D" and"E"arePulseWidthModulated(PWM)solenoids and control the pressures to the various apply components. The sixth solenoid is the Electronic Pressure Control (EPC) solenoid. Refer to Figure 4 forthesolenoidapplicationchartforeachgearandfor thelocation andidentificationofeachsolenoidonthe valvebody.

MANUAL SELECTOR LEVER OPERATION

In manual selector lever position "P" no gear is selected. The parking pawl is engaged manually by the shift shaft linkage and the engine can be started.

R N D

In manual selector lever position "R" reverse gear is selected. Reverse allows the vehicle to be operated in a rearward direction, at a reduced gear ratio.

In manual selector lever position "N" no gear is selected. Thedrivelineisnotlocked,sothewheels are free to rotate. The engine may be started in Neutral.

In manual selector lever position "D" the transmission control system allows upshifts first throughfourthgearsautomatically. WhentheO/D cancel switch is pressed, shifting into 4th gear is prevented, or if it is already in 4th gear, the transmissionshiftsdownto3rdgear.

Inmanualselectorleverposition"2" only 2ndgear is available. The transmission controls will not allowashiftintofirstgear.

If the manual selector lever is moved to position "2" at an excessive vehicle speed for 2nd gear, the computeronlyallowstheshifttotakeplacewhena safevehiclespeedhasbeenreached.

In manual selector lever position "1" only first is available.. The transmission control system applies the Low/Reverse clutch to provide engine brakingeffect.

If the manual selector lever is moved to position "1" at an excessive vehicle speed for 1st gear, the computer only allows the down shift to take place whenasafevehiclespeedhasbeenreached.

SHIFT SOLENOIDAPPLY CHART

Range Park Reverse Neutral Drive-1st Manual-1st

Shift "A" (On-Off) ON ON OFF

Drive-2nd Drive-3rd Drive-4th

ON ON ON

Shift "B" (On-Off) ON ON ON

OFF OFF OFF OFF OFF ** OFF ** OFF

Not Fed Not Fed Not Fed

OFF

OFF OFF ** OFF OFF

Not Fed Not Fed

Transmission Fluid Temp Sensor (Snaps Onto Filter)

Shift "C" (PWM) Shift "D" (PWM) Shift "E" (PWM) EPC Solenoid *** *** *** *** *** *** *** ***

OFF OFF OFF OFFOFF OFF OFF

ON

Not Fed Not Fed Not Fed ON ON ON

SOLENOIDAND FLUID TEMPERATURE

SENSOR LOCATIONS

Shift Solenoid "D" XS4Z-7G484-AA

Shift Solenoid "E" XS4Z-7G484-AA

Shift Solenoid "C" XS4Z-7G484-AA

*** EPC Control dependent on throttle position and vehicle speed. ** TCC control dependent on throttle position, vehicle speed, brake switch. Figure 4

Shift Solenoid "B" XS4Z-7H148-AA

Shift Solenoid "A" XS4Z-7H148-AA

EPC Solenoid XS4Z-7G383-AA

SOLENOIDAND TRANSAXLE FLUID TEMPRESISTANCE CHART

4

1 7

2 8

5

6

3 9

Transaxle Case Connector (Face View)

Transaxle Component Terminals

6 and Gnd. 8 and Gnd. 3 and Gnd. 9 and Gnd. 1 and Gnd. 2 and 7

6

3 9

2 8

5

4

1 7

Vehicle Harness Connector (Face View)

INTERNALTRANSAXLE COMPONENTS RESISTANCE

CHART

Ohms Resistance At 20°C (70°F)

Shift Solenoid "A" (On-Off) 10.9 - 26.2 10.9 - 26.2 1.0 - 4.2 1.0 - 4.2 1.0 - 4.2 2.4 - 7.3

Shift Solenoid "B" (On-Off) Shift Solenoid "C" (PWM) Shift Solenoid "D" (PWM) Shift Solenoid "E" (PWM) EPC Solenoid (PWM)

NOTE: Gnd. = Ground Ohm Meter to the Case

Transaxle Temperature Sensor Resistance Chart Terminals 4 and 5

0°C (32°F) = 83.2k - 107k Ohms

20°C (70°F) = 33.5k - 41.2k Ohms 40°C (104°F) = 14.6k - 17.6k Ohms 60°C (140°F) = 7.08k - 8.01k Ohms 80°C (176°F) = 3.61k - 4.06k Ohms 100°C (212°F) = 1.96k - 2.20k Ohms 120°C (248°F) = 1.13k - 1.25k Ohms 130°C (266°F) = 0.87k - 0.96k Ohms

Figure 5

Copyright © 2004ATSG

White White Green Green Blue Blue Green Brown Black Green Black Blue Blue Orange Green/Orange Green/Orange Green/Black Green/Blue Green/Yellow Green/White Yellow Brown

"Natural" Harness Connector "Black" Harness Connector "White" Harness Connector "Blue" Harness Connector "Green" Harness Connector "Black" Harness Connector

Shift Solenoid "A" (On-Off)

Shift Solenoid "C" (PWM) Shift Solenoid "D" (PWM) Shift Solenoid "E" (PWM) EPC Solenoid (PWM)

GEAR RATIO IDENTIFICATION

There are currently two different final drive axle ratioslistedforthistransaxle,invehiclesthataresold intheUnitedStates. Thetwodifferentaxleratiosare tied to the engine size in the vehicle. The easiest means of identification is on the door tag of the vehicle, as shown in Figure 7, and look for the two digitcodeundertheword"AXLE".

Anothermeansofidentificationisthefirstdigitofthe Suffix in the part number that is located on the transaxle identification tag, and is also shown in Figure7. Thiswillbetheonlymeansofidentification if someone brings you a transaxle core to purchase. We have also shown you the European ratio, as we havealreadyseensomeofthesecoresintheU.S.,and will not interchangeintoU.S.vehicles.

ELECTRONIC COMPONENT DESCRIPTION POWERTRAIN CONTROL MODULE (PCM)

The Powertrain Control Module (PCM) controls engine functions and provides total control of the 4F27E transaxle. The PCM monitors various input signals from several sensors and switches, as shown in Figure 8, and will then respond by operating solenoids for control of the line pressure, the shift scheduling and apply and release of the Torque ConverterClutch(TCC).

The PCM may also store Diagnostic Trouble Codes (DTC's) related to detected transaxle faults. If faults are detected, it will alert the driver by turning ON the Malfunction Indicator Lamp (MIL) located in the instrumentcluster,asshowninFigure8.

"FAIL-SAFE"

OPERATION

If the transaxle loses electronic control, as in blown fuse, it will operate in a fail-safe mode with the followingfeatures:

Maximumlinepressureinallpositions.

FullyfunctionalP,RandNpositions.

Operation in 3rd gear only with coast braking, whenselectorisin any forwardrange.

TCCreleasedinallpositions.

Continued on Page 11

ELECTRONIC IGNITION (EI)

TRANSMISSION RANGE (TR) SENSOR

TURBINE SHAFT SPEED (TSS) SENSOR

OUTPUT SHAFT SPEED (OSS) SENSOR

THROTTLE POSITION (TP) SENSOR

INTAKEAIR TEMP (IAT) SENSOR

ENGINE COOLANT TEMP(ECT) SENSOR

TRANSMISSION FLUID TEMP(TFT) SENSOR

MASSAIR FLOW (MAF) SENSOR

AIR CONDITIONING (AC) SWITCH

TRANSMISSION CONTROL SWITCH (TCS)

POWERTRAIN CONTROL MODULE (PCM)

ELECTRONIC PRESSURE CONTROL(EPC) SOLENOID

SHIFT SOLENOID "A" (SSA)

SHIFT SOLENOID "B" (SSB)

SHIFT SOLENOID "C" (SSC)

SHIFT SOLENOID "D" (SSD)

SHIFT SOLENOID "E" (SSE)

TRANSMISSION CONTROL INDICATOR LAMP(TCIL) O/D OFF

MALFUNCTION INDICATOR LAMP(MIL)

BRAKE PEDALPOSITION (BPP) SWITCH The "Powertrain Warning Indicator" is located on the left side of the instrument cluster as shown above and is Orange in color.